Barbie stars as Odette, the young baker's daughter who follows a unicorn in an enchanted forest. The evil wizard, Rothbart, who wants to kneel her cousin, The Good Queen, and conquer the forest, transforms Odette into a swan. The Good Queen do so that Odette is a swan by day and human by night. Odette learns that, though is not the most suitable person for this task, it is her destiny to save the enchanted forest from Rothbart.